Features precision potentiometers with no programming required. Eight channel potentiometers provide a onetoone correspondence with eight servo channels, forming an 8channel servo controller for debugging and testing 5V to 8.4V servos. Includes manual adjustment, quick centering, and passing stream protection. Manual Mode and ToCenter Mode are supported and can be switched via function keys for flexible testing workflows. Steering gear control accuracy of 0.09 degrees, with PWM minimum change value of 1 microsecond for fine, repeatable positioning. Onboard stable 8bit MCU generates resolution PWM signals to ensure precise and reliable control. Compatibility and performance Suitable for 5V8.4V servos, enabling broad hobby and educational applications. Onetoone mapping between potentiometer inputs and servo outputs simplifies setup and debugging without programming. resolution PWM control delivered by an onboard MCU supports accurate servo movements and repeatable testing. Applications and use scenarios Robotic arm tuning and testing: use the 8channel onetoone correspondence to calibrate multiple joints simultaneously with precise, repeatable positions, ideal for rapid prototyping and debugging. RC hobby projects and servo debugging: quickly test and adjust multiple servos without custom software, using manual adjustments and tocenter features for convenient checks. Educational labs and demonstrations: teach servo control concepts with a straightforward, hardwarebased testing rig that requires no programming and offers clear, precision feedback.